Ticket #54987: 52650.patch

src/wp-includes/user.php

@@ -1977 +1977 @@
          */
         if ( ! empty( $userdata['user_nicename'] ) ) {
                 $user_nicename = sanitize_user( $userdata['user_nicename'], true );
-                if ( mb_strlen( $user_nicename ) > 50 ) {
-                        return new WP_Error( 'user_nicename_too_long', __( 'Nicename may not be longer than 50 characters.' ) );
-                }
         } else {
                 $user_nicename = mb_substr( $user_login, 0, 50 );
         }
@@ -1986 +1983 @@
 
         $user_nicename = sanitize_title( $user_nicename );
 
+        /*
+         * Check user_nicename not more then 50 characters.
+         */
+        if ( mb_strlen( $user_nicename ) > 50 ) {
+                $user_nicename = mb_substr( $user_nicename, 0, 50 );
+        }
+
         /**
          * Filters a user's nicename before the user is created or updated.
          *